T. von Proschwitz, “Three land-snail species new to the Norwegian fauna: Pupilla pratensis (Clessin, 1871), Vertigo ultimathule von Proschwitz, 2007 and Balea sarsii Philippi, 1847 [= B. heydeni von Maltzan, 1881]”, Fauna Norv., vol. 30, pp. 13-19, Nov. 2010.